These dyad participants are given more information and a follow up phone call to schedule a home visit for initial screening(24<MMSE<27). During the home visit, the participants will be given the consent forms and explanation of this project regarding the purpose, length of data collection and the types of measures of this study. Investigator will use the electronic monitoring system (EMS) developed by Professor Heh's lab, Chung Yuan Christian University in the Phase I to monitor the medication adherence behavior and pilot test its agreement with the pill count and the FCG observation diary. Investigator will apply for the compensations for participants for who finish the initial adherence observation (4 weeks) (baseline data collection). Those who are enrolled for the 6 month intervention phase will receive additional compensation if funded.